Industrial terrace special mortar resistant to fire at high temperature and preparation method of industrial terrace special mortar

Abstract

The invention relates to the field of mortar and a preparation method thereof, in particular to high-temperature refractory industrial terrace special mortar and a preparation method thereof.The high-temperature refractory industrial terrace special mortar comprises the following components: 14-16% of a cementing material, 30-40% of refractory aggregate, 2-6% of an additive, 2-6% of a wetting agent and the balance of water and inevitable impurities; according to the invention, the refractory cement is used as a main material, the mixture of the refractory stone, the high-alumina bauxite and the silica sand is used as an auxiliary material, and the additive nano gelled stone and the wetting agent sodium alkyl benzene sulfonate are added to prepare the high-temperature refractory mortar, so that the special mortar has excellent high-temperature resistance and chemical stability, and can be used for a long time in a high-temperature environment without obvious change; the high-temperature-resistant fireproof material is high in strength, so that the fireproof requirement in a high-temperature industrial environment is met, the phenomena that the surface is prone to corrosion, even cracking, stripping and hollowing occur are avoided, and the safety of industrial production is improved.

Description

Technical Field

[0001] The invention relates to the field of mortar and a preparation method thereof, and in particular to a special mortar for fire-resistant industrial flooring at high temperature and a preparation method thereof. Background Art

[0002] Mortar is a commonly used building material. Its conventional components are a mixture of water, cement and sand. It is used to apply on the ground to form a flat surface for use as a floor.

[0003] However, after being used for a period of time in a high-temperature industrial environment, the floor made of general mortar is prone to corrosion, and may even crack, peel off and hollow. In addition, it has poor fire resistance, which causes inconvenience to industrial production and improves the safety of industrial production.

[0004] Therefore, in order to solve the problem that the floor is easily damaged after being used for a period of time in the above-mentioned high-temperature industrial environment, a special mortar for refractory industrial floor under high temperature and a preparation method thereof can be designed. Summary of the invention

[0005] In order to overcome the problem that the floor is prone to damage after being used for a period of time in a high-temperature industrial environment.

[0006] The technical solution of the present invention is: a special mortar for refractory industrial flooring at high temperatures, characterized in that it includes the following components, in percentage by mass: 14-16% of cementitious material, 30-40% of refractory aggregate, 2-6% of additive, 2-6% of wetting agent, and the balance is water and inevitable impurities.

[0007] Preferably, the cementitious material is refractory cement.

[0008] Preferably, the aggregate is any combination of two or three of refractory stone, high-alumina bauxite and silica sand.

[0009] Preferably, the additive is nano-colloid stone or aluminum dihydrogen phosphate, or any combination of the two.

[0010] Preferably, the wetting agent is one or a combination of two of acrylate polymer or sodium alkylbenzene sulfonate.

[0011] A method for preparing a special mortar for refractory industrial flooring at high temperature, comprising the special mortar for refractory industrial flooring at high temperature as described above, and the steps are as follows:

[0012] The first step is preliminary preparation: formulate the mortar formula according to the technical requirements of high temperature refractory industrial floor, and take out the corresponding amount of cementitious materials, refractory aggregates, additives and wetting agents according to the formula;

[0013] The second step is material processing: the refractory cement of the cementitious material is sieved through a 150-200 mesh sieve, and the grass roots, leaves, branches, plastics, coal blocks, slag and other impurities in the refractory cement are screened out. The particle size of the screened refractory cement should not exceed 200 mesh. The refractory stone in the refractory aggregate is put into an ore crusher for crushing for 10-20 minutes. The refractory stone high-alumina bauxite in the refractory aggregate is sieved through a 50-100 mesh sieve; the silica sand in the refractory aggregate is sieved through a 100-150 mesh sieve.

[0014] The third step is mortar mixing: weigh the cementitious material and refractory aggregate raw materials according to the proportion, and put the refractory cement, refractory stone, refractory stone high-alumina bauxite, and silica sand into the mixing equipment in turn and stir for 60 to 90 minutes to make mixture A;

[0015] Add the additive nano-colloid stone and the wetting agent sodium alkylbenzene sulfonate into water, and stir with a small stirrer for 10 to 15 minutes to prepare a mixture B;

[0016] Inject the B mixture evenly into the stirring A mixture, and stir the A mixture and the B mixture for 40 to 60 minutes to achieve the required high-temperature refractory mortar quality;

[0017] Step 4: Mortar test: Conduct consistency test on the prepared mortar;

[0018] For consistency test, take out an appropriate amount of high-temperature refractory mortar and put it into the test cone. Gently tap the high-temperature refractory mortar 10 to 15 times to make the upper surface of the high-temperature refractory mortar flat. Put a cone into the mortar from the top and let it sink freely. After 10 seconds, read the sinking distance, which is the consistency of the high-temperature refractory mortar. The consistency of the high-temperature refractory mortar should not be greater than 3.5cm.

[0019] The fifth step is floor construction: after the high-temperature refractory mortar is evenly mixed, the laying work can be carried out;

[0020] Spray water on the ground base to keep the wall moist, then apply a layer of high-temperature refractory mortar, use a wooden scraper to scrape the high-temperature refractory mortar to make it uniform in height, and then use the same method to apply the second and third layers of high-temperature refractory mortar. The thickness of each layer is 5 to 8 mm, and finally do the calendering work.

[0021] Preferably, in the third step, the rotation speed of the stirring equipment for preparing mixture A is set to 100-300 r / min.

[0022] Preferably, in the third step, the speed of the small and medium-sized agitator for preparing the B mixture is set to 50-80 r / min.

[0023] As a preference, after the fifth step of floor construction is completed, maintenance is required for 3 to 5 days, and the compressive strength must reach 20 to 30 MPa.

[0024] Beneficial effects of the present invention:

[0025] Compared with the traditional mortar mixed with water, cement and sand, the present invention uses refractory cement as the main material, refractory stone, high-alumina bauxite and silica sand mixture as auxiliary materials, and adds additives such as nano-colloid stone and wetting agent sodium alkylbenzene sulfonate to make a high-temperature refractory mortar. This special mortar has excellent high-temperature resistance and chemical stability, can be used for a long time in a high-temperature environment without obvious changes, has high strength to meet the refractory requirements in a high-temperature industrial environment, avoids the surface from being easily corroded, and even cracking, peeling and hollowing, thereby improving the safety of industrial production. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the embodiments.

[0027] Example 1

[0028] The present invention provides an embodiment: a special mortar for refractory industrial flooring at high temperatures, characterized in that it comprises the following components, in percentage by mass: 15% cementitious material, 40% refractory aggregate, 4% additive, 3% wetting agent, and the balance being water and unavoidable impurities.

[0029] Preferably, the cementitious material is refractory cement.

[0030] Preferably, the aggregate is any combination of two or three of refractory stone, high-alumina bauxite and silica sand.

[0031] Preferably, the additive is nano-colloid stone or aluminum dihydrogen phosphate, or any combination of the two.

[0032] Preferably, the wetting agent is one or a combination of two of acrylate polymer or sodium alkylbenzene sulfonate.

[0033] A method for preparing a special mortar for refractory industrial flooring at high temperature, comprising the special mortar for refractory industrial flooring at high temperature as described above, and the steps are as follows:

[0034] The first step is preliminary preparation: formulate the mortar formula according to the technical requirements of high temperature refractory industrial floor, and take out the corresponding amount of cementitious materials, refractory aggregates, additives and wetting agents according to the formula;

[0035] The second step is material processing: the refractory cement of the cementitious material is sieved through a 200-mesh sieve, and the grass roots, leaves, branches, plastics, coal blocks, slag and other impurities in the refractory cement are screened out. The particle size of the screened refractory cement should not exceed 200 mesh. The refractory stone in the refractory aggregate is put into an ore crusher for crushing for 15 minutes. The refractory stone high-alumina bauxite in the refractory aggregate is sieved through a 100-mesh sieve; the silica sand in the refractory aggregate is sieved through a 150-mesh sieve.

[0036] Step 3: Mortar mixing: weigh the cementitious material and refractory aggregate raw materials according to the proportion, put the refractory cement, refractory stone, refractory stone high-alumina bauxite and silica sand into the mixing equipment in turn and stir for 90 minutes to make mixture A;

[0037] Add the additive nano-colloid stone and the wetting agent sodium alkylbenzene sulfonate into water and stir with a small stirrer for 15 minutes to prepare mixture B;

[0038] Inject the B mixture evenly into the stirring A mixture, and stir the A mixture and the B mixture for 40 minutes to achieve the required high-temperature refractory mortar quality;

[0039] Step 4: Mortar test: Conduct consistency test on the prepared mortar;

[0040] For consistency test, take out an appropriate amount of high-temperature refractory mortar and put it into the test cone. Gently tap the high-temperature refractory mortar 15 times to make the upper surface of the high-temperature refractory mortar flat. Put a cone into the mortar from the top and let it sink freely. After 10 seconds, read the sinking distance, which is the consistency of the high-temperature refractory mortar. The consistency of the high-temperature refractory mortar should not be greater than 3.5cm.

[0041] The fifth step is floor construction: after the high-temperature refractory mortar is evenly mixed, the laying work can be carried out;

[0042] Spray water on the ground base to keep the wall moist, then apply a layer of high-temperature refractory mortar, use a wooden scraper to scrape the high-temperature refractory mortar to make it uniform in height, and then use the same method to apply the second and third layers of high-temperature refractory mortar, each layer is 5 mm thick, and finally do the calendering work.

[0043] Example 2

[0044] The present invention provides an embodiment: a special mortar for refractory industrial flooring at high temperatures, characterized in that it comprises the following components, in percentage by mass: 16% cementitious material, 35% refractory aggregate, 4% additive, 4% wetting agent, and the balance being water and unavoidable impurities.

[0045] Preferably, the cementitious material is refractory cement.

[0046] Preferably, the aggregate is any combination of two or three of refractory stone, high-alumina bauxite and silica sand.

[0047] Preferably, the additive is nano-colloid stone or aluminum dihydrogen phosphate, or any combination of the two.

[0048] Preferably, the wetting agent is one or a combination of two of acrylate polymer or sodium alkylbenzene sulfonate.

[0049] A method for preparing a special mortar for refractory industrial flooring at high temperature, comprising the special mortar for refractory industrial flooring at high temperature as described above, and the steps are as follows:

[0050] The first step is preliminary preparation: formulate the mortar formula according to the technical requirements of high temperature refractory industrial floor, and take out the corresponding amount of cementitious materials, refractory aggregates, additives and wetting agents according to the formula;

[0051] The second step is material processing: the refractory cement of the cementitious material is sieved through a 200-mesh sieve, and the grass roots, leaves, branches, plastics, coal blocks, slag and other impurities in the refractory cement are screened out. The particle size of the screened refractory cement should not exceed 200 mesh. The refractory stone in the refractory aggregate is put into an ore crusher for crushing for 15 minutes. The refractory stone high-alumina bauxite in the refractory aggregate is sieved through a 100-mesh sieve; the silica sand in the refractory aggregate is sieved through a 1000-mesh sieve.

[0052] The third step is mortar mixing: weigh the cementitious material and refractory aggregate raw materials according to the proportion, put the refractory cement, refractory stone, refractory stone high-alumina bauxite, and silica sand into the mixing equipment in turn and stir for 75 minutes to make mixture A;

[0053] Add the additive nano-colloid stone and the wetting agent sodium alkylbenzene sulfonate into water and stir with a small stirrer for 10 minutes to prepare a mixture B;

[0054] Inject the B mixture evenly into the stirring A mixture, and stir the A mixture and the B mixture for 50 minutes to achieve the required high-temperature refractory mortar quality;

[0055] Step 4: Mortar test: Conduct consistency test on the prepared mortar;

[0056] For consistency test, take out an appropriate amount of high-temperature refractory mortar and put it into the test cone. Gently tap the high-temperature refractory mortar 15 times to make the upper surface of the high-temperature refractory mortar flat. Put a cone into the mortar from the top and let it sink freely. After 10 seconds, read the sinking distance, which is the consistency of the high-temperature refractory mortar. The consistency of the high-temperature refractory mortar should not be greater than 3.5cm.

[0057] The fifth step is floor construction: after the high-temperature refractory mortar is evenly mixed, the laying work can be carried out;

[0058] Spray water on the ground base to keep the wall moist, then apply a layer of high-temperature refractory mortar, use a wooden scraper to scrape the high-temperature refractory mortar to make it uniform in height, and then use the same method to apply the second and third layers of high-temperature refractory mortar. The thickness of each layer is 5 to 8 mm, and finally do the calendering work.

Claims

1. A special mortar for fire-resistant industrial floor at high temperature, characterized in that: Calculated by mass percentage, the composition includes: 14-16% of cementitious material, 30-40% of refractory aggregate, 2-6% of additive, 2-6% of wetting agent, and the balance is water and inevitable impurities.

2. The high temperature fire-resistant industrial floor special mortar according to claim 1, characterized in that: The cementitious material is refractory cement.

3. The high temperature fire-resistant industrial floor special mortar according to claim 1, characterized in that: The aggregate is any combination of two or three of refractory stone, high-alumina bauxite and silica sand.

4. The high temperature fire-resistant industrial floor special mortar according to claim 1, characterized in that: The additive is one of nano-colloid stone or aluminum dihydrogen phosphate or any combination of the two.

5. The high temperature fire-resistant industrial floor special mortar according to claim 1, characterized in that: The wetting agent is one of acrylate polymer or sodium alkylbenzene sulfonate or any combination of the two.

6. A method for preparing a special mortar for refractory industrial flooring at high temperature, characterized in that It comprises a special mortar for high temperature fire-resistant industrial flooring according to any one of claims 1 to 5, and the steps are as follows: The first step is preliminary preparation: formulate the mortar formula according to the technical requirements of high temperature refractory industrial floor, and take out the corresponding amount of cementitious materials, refractory aggregates, additives and wetting agents according to the formula; The second step is material processing: the refractory cement of the cementitious material is sieved through a 150-200 mesh sieve, and the grass roots, leaves, branches, plastics, coal blocks, slag and other impurities in the refractory cement are screened out. The particle size of the screened refractory cement should not exceed 200 mesh. The refractory stone in the refractory aggregate is put into an ore crusher for crushing for 10-20 minutes. The refractory stone high-alumina bauxite in the refractory aggregate is sieved through a 50-100 mesh sieve; the silica sand in the refractory aggregate is sieved through a 100-150 mesh sieve. The third step is mortar mixing: weigh the cementitious material and refractory aggregate raw materials according to the proportion, and put the refractory cement, refractory stone, refractory stone high-alumina bauxite, and silica sand into the mixing equipment in turn and stir for 60 to 90 minutes to make mixture A; Add the additive nano-colloid stone and the wetting agent sodium alkylbenzene sulfonate into water, and stir with a small stirrer for 10 to 15 minutes to prepare a mixture B; Inject the B mixture evenly into the stirring A mixture, and stir the A mixture and the B mixture for 40 to 60 minutes to achieve the required high-temperature refractory mortar quality; Step 4: Mortar test: Conduct consistency test on the prepared mortar; For consistency test, take out an appropriate amount of high-temperature refractory mortar and put it into the test cone. Gently tap the high-temperature refractory mortar 10 to 15 times to make the upper surface of the high-temperature refractory mortar flat. Put a cone into the mortar from the top and let it sink freely. After 10 seconds, read the sinking distance, which is the consistency of the high-temperature refractory mortar. The consistency of the high-temperature refractory mortar should not be greater than 3.5cm. The fifth step is floor construction: after the high-temperature refractory mortar is evenly mixed, the laying work can be carried out; Spray water on the ground base to keep the wall moist, then apply a layer of high-temperature refractory mortar, use a wooden scraper to scrape the high-temperature refractory mortar to make it uniform in height, and then use the same method to apply the second and third layers of high-temperature refractory mortar. The thickness of each layer is 5 to 8 mm, and finally do the calendering work.

7. The method for preparing the special mortar for refractory industrial floor at high temperature according to claim 6, characterized in that: In the third step, the speed of the stirring equipment for preparing mixture A is set to 100-300 r / min.

8. The method for preparing the special mortar for refractory industrial floor at high temperature according to claim 6, characterized in that: In the third step, the speed of the small and medium-sized agitator for preparing the B mixture is set to 50-80 r / min.

9. The method for preparing the special mortar for refractory industrial floor at high temperature according to claim 6, characterized in that; After the fifth step, the floor construction needs to be maintained for 3 to 5 days, and the compressive strength needs to reach 20 to 30 MPa.